improve lightbox sizing with forms

callOnContentReady before measuring size of lightbox as forms use
ResponsiveEl and change their height
don't return height if adaptHeight is not set and maxSize is not reached

fixes size adapdation of forms with height below window height
callOnContentReady when hiding errorEl

fixes size adapdation of lightbox forms
ResponsiveEl: re-evaluate every time callOnContentReady is called

callOnContentReady is also called if content is shown/hidden or changes it's size (lightbox)
we have to re-evaluate in those cases.
callOnContentReady after sizing and positioning lightbox to support responsive form in lightbox
ResponsiveEl: callOnContentReady when changing class

required for responsive form in lightbox
avoid flicker in ie8 where there is no proper domready event

this allows ResponsiveEl to add class before any content is displayed
HelpText for VideoPlayer Upload
Translation for HelpText in VideoPlayer
translation in Kwf
Add Anchor Component
Add possibility to choose anchor in LinkTag_Intern
Output anchor in Link
Allow linking to own page when link is in content
Scroll smoothly to anchor
Make AnchorField working when LinkTag is not saved yet
Use fetchColumnsByPrimaryId to get both fields at once
Use more unique xtype
Choose anchor name freely and convert it with Ascii-filter to anchor
bugfix for Fade Elements.js

set _isAnimating correctly back to false when activeEl is not visible or activeEl is nextEl